Numerical Simulation of Decontamination of Airborne Fission Products during In-Vessel Release Phase by Containment Spray

Table 6

PWR accidental fission products release fractions in LOCA.

Nuclide group	PWR release fraction
	Cladding failure (cladding gap release); (0.5 h)	Core melt (in-vessel release); (1.3 hours)
Noble gases (Kr, Xe)	0.05	0.95
Halogens (I, Br)	0.05	0.35
Alkali metals (Cs, Rb)	0.05	0.25
Tellurium group (Te, Sb, Se)	0	0.05
Barium, strontium (Ba, Sr)	0	0.02
Noble metals (Ru, Rh, Pd, Mo, Tc, and Co)	0	0.0025
Cerium group (Ce, Pu, Np)	0	0.0005
Lanthanides (La, Zr, Nd, Eu, Nb, Pm, Pr, Sm, Y, Cm, and Am)	0	0.0002

Data from Soffer et al. (1995).